"Strain" is an archetype used by E'Rah in the Yu-Gi-Oh! ZEXAL manga.

E'Rah uses "Strain" monsters in conjunction with "Sky of Endless Night" to produce "E'Rah Monsters" (a pun with "error monsters", in Japanese) - corrupted and more powerful counterparts of the opponent's monsters - which allow her to always control monsters with higher ATK than her opponent's. This strategy reflects E'Rah's beliefs that where there is light, there is shadow as well, and the shadow is always stronger than the light.



Visually, the "Strain" monsters bear a resemblance to various forms of microorganisms.

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